4results about How to "Large output displacement" patented technology

The present invention provides a four-link direct-push piezoelectric linear motor, which is composed of a stator, a sliding base, a preload mechanism, a mover and a base. The stator is composed of two four-link assemblies, which are composed of a four-link mechanism, a laminated piezoelectric ceramic, a preload spring, an adjustment stud and a driving foot; the stator is fixed to the sliding base by bolts, and the sliding base is installed on the base by cross rollers and guide rail fixing blocks thereof; the preload mechanism provides an adjustable preload for the piezoelectric linear motor, which is transmitted to the contact surface between the stator driving foot and the mover through the sliding base, and applies electrical signals with a phase difference of 90° to the two groups of laminated piezoelectric ceramics of the motor respectively, so that the alternating driving of the two feet of the motor can be realized.

The utility model relates to petroleum production equipment technical field especially discloses a kind of annular high-pressure manifold, including high-pressure discharge component, high-pressure discharge component is arranged at the both ends of fracturing pump and with fracturing pump forms annular pipeline closed loop, further including protection component, protection component is arranged at high-pressure discharge component side.The utility model is reduced by using annular manifold as a whole, the flow resistance of fracturing fluid in fracturing pump and manifold, with buffer, reduce energy loss, make pressure boost faster, balance the vibration brought by inside stroke of fracturing pump and have safe fire extinguishing function.

This invention discloses a linear displacement actuator based on a single-pass shape memory alloy, comprising a housing, within which a movable cam is disposed. An auxiliary spring and a shape memory alloy spring are respectively disposed on opposite sides of the movable cam. Electrode plate I and electrode plate II are respectively disposed at both ends of the shape memory alloy spring. An output rod is connected to the movable cam via rollers. This invention solves the problem of difficulty in achieving high-precision deformation control in existing actuators due to the nonlinear deformation characteristics of shape memory alloys.

The present invention relates to an SMA linear actuator, comprising: an SMA winding mechanism: comprising an SMA wire, a driving spindle, a spindle pulley mounted on the driving spindle, and a transition pulley group located next to the driving spindle, one end of the SMA wire is wound and fixed on the spindle pulley, and the other end passes through the transition pulley group and is fixed, and the SMA wire is also energized; a heat dissipation mechanism: it is arranged next to the SMA winding mechanism and is used to dissipate heat for the SMA wire; an actuator: comprising an inner tube, an outer tube and a connecting end plate, one end of the inner tube is connected to the driving spindle, and the other end is fixedly connected to the connecting end plate, and the outer tube itself can be extended and retracted along the driving spindle direction, and one end of the inner tube is fixed, and the other end is fixedly connected to the connecting end plate. The present invention can better realize linear drive, has a simple structure, and has a large output displacement.